1003313491 has 2 divisors, whose sum is σ = 1003313492. Its totient is φ = 1003313490.

The previous prime is 1003313483. The next prime is 1003313503. The reversal of 1003313491 is 1943133001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1003313491 - 2³ = 1003313483 is a prime.

It is a super-2 number, since 2×1003313491² = 2013275922445214162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1003313431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501656745 + 501656746.

It is an arithmetic number, because the mean of its divisors is an integer number (501656746).

Almost surely, 2^1003313491 is an apocalyptic number.

1003313491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003313491 is an equidigital number, since it uses as much as digits as its factorization.

1003313491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1003313491 is about 31675.1241670810. The cubic root of 1003313491 is about 1001.1032793271.

Adding to 1003313491 its reverse (1943133001), we get a palindrome (2946446492).

The spelling of 1003313491 in words is "one billion, three million, three hundred thirteen thousand, four hundred ninety-one".